ChibiOS Free Embedded RTOS

The simulator serial port to TCP/IP connection is very useful for automated testing.
However, it is slow - in current ChibiOS code I get about 6 kB/s.
The patch below is a simple modification that handles serial interrupts in loop until the buffer is fully processed.
Operating system will usually ...

Hi,

I made a few extra macros in my board.h which in my opinion make it easier to configure IO pins.
Example of pin configuration:


#define GPIOA_PINS(X) \
X(GPIOA, 0, SENS3 , ANALOG , LOW , PUSHPULL , 50M , FLOATING , 0) \
X(GPIOA, 1, SENS2 , ANALOG , LOW , PUSHPULL , 50M , FLOATING , 0) \
X ...

Perhaps the cache invalidation should be made part of the DMA functions.

So that dmaStreamEnable() invalidates cache for RAM->peripheral DMA. And dmaStreamDisable() invalidates cache for peripheral->RAM DMA.

I have used the "separate area for DMA transfers" on NuttX, when I had it configured so that STM32F4 CCM is part of normal heap. This model is very annoying to work with, so I would not recommend making it mandatory.

Biggest problems I encoutered:

⋅ Buffers can come from surprising ...

More and more of the RTOS applications are considered non-critical. As a natural consequence, the firmware is not as strictly developed and is often of poor quality, yielding many hard-to-debug failures on the field.

Therefore logging and error reporting will become very important. Many people ...

Here's my checklist for getting USB to work on STM32L151:

1) The port mode must be PIN_MODE_INPUT
2) The port speed must be configured as 40MHz (highest)
3) The port pull-ups must be disabled
4) The PLL output frequency must be 96MHz